Step-by-Step Instructions:
Pre-bake the tart shell according to package instructions and let it cool.
- Heat cream and sugar in a saucepan until it simmers.
- Pour the hot cream over the chopped chocolate and butter. Stir until smooth.
- Mix in half of the chopped hazelnuts.
- Pour the chocolate mixture into the tart shell. Sprinkle with remaining hazelnuts.
- Chill in the refrigerator until set.
- Before serving, decorate with small pieces of edible gold leaf.